A river kingdom of haunted ruins, ruled by crocodiles.

FIVE DAYS BY BOAT, UPRIVER

You come to wide lake, watched by limestone cliffs. Shapes lurk in the water. Shapes wait up ahead.

Riches clog Mr-Kr-Grs rivers but its citizens build neither soaring temple nor palace spire. It is forbidden to set stone upon stone, in Mr-Kr-Gr.

The crocodiles say so. The crocodiles rule, here.

What stone cities exist in Mr-Kr-Gr are overgrown ruins  haunted by corpse-honey hosts; mosquito witches; gods trapped in the prison of their idols.

These old cities are proscribed, also. The crocodiles say so. Doesnt stop downlander expeditions, though. Old cities are always full of treasure.

Mr-Kr-Gr is an adventure setting inspired by riverine life, the crocodiles of Negeri Sembilan, and the lost cities of Southeast Asia. A rules-less, 44-page gazetteer filled with characters, locations, and detailed black-and-white art. Random NPC, encounter, and magic-crocodile generators.

Reviews:

Its less a setting book or module, and more a work of sublime poetry. A world visualized in sparse words and phrases and drawings. I cant remember the last time I felt this connected to a game world, and yet its so short it can be read in half an hour.
Tomer G, The Gauntlet Blog